Clinical and Radiologic Findings After Multilevel Cervical Total Disk Replacement: Defining Radiologic Changes to Predict Surgical Outcomes

MCTDR was effective in reducing pain and improving cervical lordosis in patients with multilevel cervical disk herniation or stenosis. Despite a significant decrease in the flexion angle, it could maintain C2-7 ROM presumably by compensating with C2-7 extension angle increase. Clinical success after MCTDR was crucially related to retaining original C2-7 ROM and minimizing ROM angular changes at both the C2-7 and MCTDR levels.